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How to Unlock a Canon SD Memory Card

Digital photographers use SD memory cards to store and transport digital image files. These cards come with a function that allows you to lock them so that no further data can be written to the card. This can be extremely important if you are taking pictures using on multiple cards and want to avoid accidentally deleting or overwriting previous images. You can unlock an SD memory card by using the switch on the side of the SD card.

Instructions

- 1
  Turn off the camera or properly eject the card from the card reader. This will prevent any data from being lost.
- 2
  Remove the SD card from the camera or card reader. Hold the card with the label facing towards you. You should see a switch on the left side of the card.
- 3
  Move the switch until it is all the way at the top of the card. This is the unlocked position, and the card may now be used or formatted for re-use.
- 4
  To protect your images, follow Steps 1 and 2, then move the switch toward the bottom of the card, which locks the card and protects your images from accidental erasure or overwriting.

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